KR100852227B1 - Recording device, recording method, and computer program - Google Patents

Abstract

The recording apparatus 200 includes (i) a first recording layer L0 having a first area 109 in which recording information is recorded by irradiation of a laser beam LB, and the recording information is recorded, and (ii) ) The recording information is recorded by irradiating the laser light through the first recording layer, and the edge of the inner circumferential side has a second region 114 corresponding to the edge of the outer circumferential side of the first region. A recording device (352) for recording the recording information on the recording medium (100) comprising two recording layers (L1) by irradiation of the laser light; And a relative position shift between an address defined at a predetermined position of the first recording layer and an address related to the predetermined position of the second recording layer, with the end of the outer peripheral side of the first area as a starting point. Recording the pre-information as the recording information in advance in the area part of the part of the first area except at least the area part having a size corresponding to a tolerance length indicating the permissible range of Control device 354 for controlling the device.

Tolerance length, clearance, positive track path method, reduced address method, incremental address method, pre-record area

Description

Recording device, recording method and computer program {RECORDING DEVICE, RECORDING METHOD, AND COMPUTER PROGRAM}

The present invention relates to, for example, a recording apparatus such as a DVD recorder, a recording method thereof, and a computer readable recording medium having recorded thereon a computer program for causing a computer to function as such a recording apparatus.

For example, in an information recording medium such as CD-ROM (Compact Disc-Read Only Memory), CD-R (Compact Disc-Recordable), DVD-ROM, or the like, as described in Patent Documents 1 and 2 described below, Information recording media such as multi-layer type optical discs, in which a plurality of recording layers are stacked or attached on the same substrate, have also been developed. Then, in an information recording apparatus such as a DVD recorder for recording information on a dual layer, that is, a two-layer type optical disc, a recording layer located on the frontmost side (i.e., closer to the optical pickup) when viewed from the irradiation side of the laser beam (this In this specification, a laser beam for recording is focused on the "L0 layer", so that an irreversible change recording method by heating the data to the L0 layer or a rewritable recording method by heating (a rewritable method). In addition, the laser light is applied to the recording layer (hereinafter referred to as "L1 layer") located on the rear side of the L0 layer (i.e., far from the optical pickup) when viewed from the irradiation side of the laser light through the L0 layer or the like. By condensing or concentrating the information, information is recorded in the irreversible change recording method or the rewritable recording method by heating on the L1 layer.

Patent Document 1: Japanese Patent Laid-Open No. 2000-311346

Patent Document 2: Japanese Patent Application Laid-Open No. 2001-23237

In such a two-layer type optical disc, it is necessary to irradiate laser light through the L0 layer when data is recorded in the L1 layer. In this case, data may be recorded in the L0 layer through which the laser beam irradiated to the L1 layer passes, or data may not be recorded. In this way, the recording state of the L0 layer is not necessarily unified, and thus the state of the laser light irradiated to the L1 layer changes. Therefore, the inventor of the present invention and the like have devised a method of properly recording data on the L1 layer by first making the L0 layer recorded.

However, the position where the address of the LO layer or the L1 layer is defined in the design and the position where the address of the optical disk actually manufactured are defined may not necessarily match depending on the quality of the manufacturing process. That is, in some cases, an optical disc in which an actual address is located at a position shifted from a radial position at which an address should be located is designed. Therefore, there is a technical problem that a predetermined area is not disposed at the intended position in the design, and as a result, the laser light is not necessarily irradiated to the L1 layer through the recording area in the already recorded state of the L0 layer.

On the other hand, for example, in the two-layer type optical disc of the positive track path method, an intermediate region is formed on the outermost circumferential side of the optical disc. This intermediate region is for buffering the switching operation when switching the focus of the laser light from the L0 layer to the L1 layer, and dummy data or the like is recorded during finalizing. At this time, in order to shorten the time required for the finalizing process, a technique of recording predetermined dummy data (hereinafter referred to as " pre-recording ") in advance in an intermediate area during a recording operation is provided. It is designed by the inventor. At this time, for example, in the case of the development of the current standard, for example, a two-layer type DVD-R which is a standard for an optical disc, an ODTA (for correcting the power of laser light) is provided on the outer circumferential side of each middle region of the L0 layer and the L1 layer. Outer Disc Testing Area) is formed. Since ODTA is used to calibrate the power of the laser light, if the ODTA is in the L1 layer, it is necessary to strictly define the recording state of the recording area in the L0 layer. Specifically, data is defined not to be recorded in the recording area of the L0 layer facing the ODTA of the L1 layer which has not been used yet. Accordingly, prior recording of the intermediate area close to the ODTA also needs to be selectively performed by the appropriate recording area. However, as described above, due to the shift of the address position at the time of manufacture or the like, this appropriate recording area cannot be specified preferably, and as a result, since the pre-recording cannot be performed sufficiently, the time required for the finalizing process can be shortened. There is no technical problem.

Therefore, the present invention allows a recording apparatus, a recording method, and a computer to make it possible to preferably perform pre-recording for shortening the time required for the finalizing process even in an information recording medium having a plurality of recording layers, for example. An object of the present invention is to provide a computer-readable recording medium having recorded thereon a computer program for functioning as a recording device.

(Recording device)

The above object of the present invention is achieved by (i) recording a recording information by irradiation of a laser beam, the first recording layer having a first area in which the recording information is recorded, and (ii) the first recording layer through the first recording layer. The recording information is recorded by irradiating a laser beam, and the recording medium includes a second recording layer having a second region whose edge on the inner circumferential side corresponds to an edge on the outer circumferential side of the first region. A recording device for recording the record information by irradiation of light; And a relative position shift between an address defined at a predetermined position of the first recording layer and an address related to the predetermined position of the second recording layer, with the end of the outer peripheral side of the first area as a starting point. Recording the pre-information as the recording information in advance in the area part of the part of the first area except at least the area part having a size corresponding to a tolerance length indicating the permissible range of It can be achieved by the first recording apparatus, including a control device for controlling the device.

According to the first recording apparatus of the present invention, by the operation of the recording device, recording information including video information, audio information, and the like can be preferably recorded on a recording medium having a first recording layer and a second recording layer. . For example, recording information is recorded in the first recording layer by irradiating laser light to focus on the first recording layer, while recording information is recorded in the second recording layer by irradiating laser light with focus on the second recording layer. Is recorded. In the first recording apparatus, the first recording layer includes, in addition to a data area in which recording information such as video information and audio information is recorded, for example, a first area (for example, a laser) in which recording information is recorded during finalization processing. And an intermediate region to be described later used to buffer the switching operation when switching the focus of the light from the L0 layer to the L1 layer or from the L1 layer to the L0 layer. The second recording layer also includes a second region (e.g., ODTA described later used for correcting the power of the laser beam). An end portion on the inner circumferential side of the second region corresponds to an end portion on the outer circumferential side of the first region. Here, the expression "corresponds to" indicates that the design exists in a generally opposing position (for example, approximately the same radial position), and in an actual recording medium, a position necessarily facing by an influence in a manufacturing process or the like. Not in

In the first recording apparatus, in particular, advance information is pre-recorded in a part of the area of the first area prior to the finalizing process by the operation of the control device. At this time, from the position indicated by the address of the edge of the outer peripheral side of the first region (i.e., the end of the first region, which is generally coincident with the end of the inner peripheral side of the second region in design) to the tolerance length Dictionary information is pre-recorded in the area part of the part of the first area except at least the area part having the corresponding size. Specifically, in the case of the positive track path type recording medium, a part of the first area except for the area part from the position indicated by the address of the end of the outer peripheral side of the first area to the position moved by the tolerance length to the inner peripheral side Dictionary information is prerecorded in the area portion. This "tolerance length" indicates the allowable range of relative position shift between an address defined at a predetermined position in the design in the first recording layer and an address related to the predetermined position in the second recording layer. In other words, the "tolerance length" indicates the allowable range of relative position shift between an address defined at a predetermined position in the design in the first recording layer and an address defined at a predetermined position in the design in the second recording layer. . In other words, the "tolerance length" means (i) in the first recording layer, the allowable range of positional shift between the prescribed position in the design medium and the position of the predetermined address in the actually manufactured recording medium, and ( ii) The predetermined address in the second recording layer is the sum of the allowable ranges of positional shifts between the prescribed position in the design and the predetermined address position in the actually produced recording medium. Note that " dictionary information " herein refers to the general information previously recorded in the first area prior to the finalization processing, and the content of the information is not limited. That is, dummy data described later is also an example of dictionary information. On the other hand, the information (control information, etc.) having different meanings is also recorded before the finalization process, which constitutes an example of "preliminary information."

In this manner, according to the first recording apparatus, advance information is pre-recorded in the first area in consideration of the positional shift of the address occurring in the manufacturing process of the recording medium or the like. Therefore, when recording the recording information in the second area, the recording information can be recorded in the second area through the first recording layer in which the recording information is not recorded, without being affected by the prior information previously recorded in the first area. have. In the first area, the dictionary information can be prerecorded without affecting the recording operation of the record information in the second area. Therefore, in the finalizing process, the size of the recording information to be recorded in the first area can be reduced, so that the time required for the finalizing process can be shortened.

As a result of the above, according to the first recording apparatus of the present invention, the pre-recording for shortening the time required for the finalizing process can be preferably performed even for an information recording medium having a plurality of recording layers.

In one aspect of the first recording apparatus of the present invention, the recording information is recorded in the second area through the first recording layer in which the recording information is not recorded.

In this aspect, for example, as described later, the power of the laser beam can be preferably calibrated using the second region, and the preliminary recording of the first region is preferably performed as described above, and the finalizing process is performed. The time required can be shortened.

In another aspect of the first recording apparatus of the present invention, in addition to the area portion corresponding to the tolerance length, the control device further comprises: (i) the first recording when the focus of the laser beam is focused on the second recording layer; A magnitude corresponding to a clearance length representing a sum of a spot radius of the laser light on the layer and (ii) a relative range of relative eccentric shift or the eccentric shift of the first recording layer and the second recording layer; The recording device is controlled to record the dictionary information in advance in an area part of a part of the first area except for the area part that has.

According to this aspect, in addition to the positional shift of the address generated in the manufacturing process of the recording medium or the like, advance information can be pre-recorded in a portion of the first region in consideration of the eccentric shift and the spot size of the laser beam. . Therefore, the recording information can be recorded in the second area through the first recording layer in which the recording information is not recorded, without being affected by the preliminary information previously recorded in the first area, and at the same time, the time required for the finalization process is shortened. can do.

In another aspect of the first recording apparatus of the present invention, the apparatus further comprises a conversion device for converting the tolerance length into a recording unit of the recording information, wherein the control device is configured to generate a size corresponding to the tolerance length converted into the recording unit. The recording device is controlled to pre-record the dictionary information in an area part of a part of the first area except at least the area part that has.

According to this aspect, the tolerance length can be recognized by a recording unit (for example, an ECC block unit) of recording information that the recording apparatus can easily recognize or handle. Thus, the recording apparatus can recognize the area part of the part of the first area preferably and relatively easily.

As described above, in the feature of the recording apparatus having the conversion device, the conversion device defines a correspondence relation between the tolerance length and the size of the record information recordable in an area portion having a size corresponding to a predetermined tolerance length. The tolerance length may be converted into a recording unit of the recording information based on the corresponding information.

In such a configuration, by referring to the corresponding information, the tolerance length can be converted into a recording unit of the recording information relatively easily.

As described above, in the recording apparatus for converting the tolerance length into recording units based on the corresponding information, the conversion device includes at least one of a type of the recording medium and a position of the first area on the first recording layer. In some cases, the tolerance length may be converted into a recording unit of the recording information based on at least one of the plurality of corresponding information.

With this arrangement, the tolerance length can be converted into the recording unit of the recording information relatively easily according to each difference without being influenced by the difference in the type of the recording medium and the difference in the arrangement of the first area.

As mentioned above, in the characteristic of the recording apparatus which converts a tolerance length into a recording unit based on correspondence information, you may comprise so that the storage device which stores the said correspondence information may be further included.

In such a configuration, by referring to the corresponding information stored in the storage device, the tolerance length can be converted into the recording unit of the recording information relatively easily.

As described above, in the feature of the recording apparatus that converts the tolerance length into recording units based on the corresponding information, the conversion device records the tolerance length based on the corresponding information recorded on the recording medium. You may comprise so that it may convert into units.

With this arrangement, by referring to the correspondence information recorded on the recording medium, even in a recording apparatus that does not have the correspondence information, the tolerance length can be converted into the recording unit of the record information relatively easily.

In another aspect of the first recording apparatus of the present invention, in the case where the recording information is recorded in the second area, the control device is arranged on the outer peripheral side of the portion of the area where the recording information is not recorded in the second area. The recording device so as to pre-record the preliminary information in an area part of a part of the first area except at least an area part having a size corresponding to the tolerance length, starting from the position of the first recording layer corresponding to an end portion; To control.

According to this aspect, the record information is already recorded in the second area, so that the area portion of the first area where the dictionary information can be prerecorded is increased. Therefore, the time required for the finalization process can be further shortened.

In another aspect of the first recording apparatus of the present invention, when the recording information is newly recorded in the second area, the control device continues in the second area, following the area portion in which the dictionary information is pre-recorded. The recording device is controlled to pre-record the dictionary information in an area part of a part of the first area having a size of an area part in which the record information is newly recorded.

According to this aspect, when recording information is newly recorded in the second area, advance information is pre-recorded in the area part of the first area having the size of the area part (or newly recorded record information) to be newly recorded. Can be. Therefore, the time required for finalization processing can be shortened.

In another aspect of the first recording apparatus of the present invention, the control device controls the recording device to record the dictionary information in advance, except for the region part of the first area in which the dictionary information is recorded in advance.

According to this aspect, the dictionary information is not overwritten in the area portion in which the dictionary information is recorded in advance. Therefore, it is unnecessary to pre-record unnecessarily, and therefore it is possible to efficiently pre-record. In addition, there is an advantage that the contents of valid dictionary information are not damaged by overwriting.

In another aspect of the first recording apparatus of the present invention, the recording information is recorded in one direction in the first recording layer, and the recording information is recorded in another direction different from the one direction in the second recording layer. do.

According to this aspect, the above-described various advantages can be obtained when recording record information on a recording medium of the positive track path method.

In another aspect of the first recording apparatus of the present invention, the tolerance length is set to 40 mu m or the like in the radial direction of the recording medium. That is, the control device stores the dictionary information in the area portion of a part of the first area except for the area portion having a size of 40 μm in the radial direction of the recording medium and having a size corresponding to the tolerance length. The recording device is controlled so as to record in advance.

According to this feature, for example, in the case of DVD-R, which is a standard for a recording medium, the allowable range of position shift of each recording layer is defined to be -20 µm to 20 µm. That is, relative positional shifts of -40 mu m to 40 mu m are allowed between the first recording layer and the second recording layer. Therefore, the above-described various advantages can be preferably obtained by performing pre-recording based on the tolerance length in consideration of this allowable range. Of course, if different values are set in the allowable range for position shift in other standards, it is preferable to use the values instead of 40 µm.

In another aspect of the first recording apparatus of the present invention, the clearance length is set to 84 mu m or approximately. That is, (i) the spot radius of the laser light on the first recording layer when the focus of the laser light is focused on the second recording layer, and (ii) each of the first recording layer and the second recording layer. The sum of the allowable ranges of the relative eccentric shift or the eccentric shift is approximately 84 µm.

According to this aspect, for example, in the case of DVD-R or the like which is a standard of a recording medium, advance recording can be preferably performed in consideration of clearance.

The above object of the present invention further provides (i) a first recording layer having a first area in which recording information is recorded by irradiation of a laser beam and the recording information is recorded, and (ii) the first recording layer. A second area having the second area in which the recording information is recorded by irradiating the laser light through the laser beam and irradiating the laser light through an area portion of the first recording layer in which the recording information is not recorded. A recording device for recording the recording information on the recording medium including two recording layers by irradiation of the laser light; And the first recording on the basis of the position of the first recording layer corresponding to at least one end of the end on the inner circumference side and the end on the outer circumference side of the portion of the area where the recording information is not recorded in the second area. Of the first region except at least a portion of the region having a size corresponding to a tolerance length indicating an allowable range of relative position shift between an address defined at a predetermined position of the layer and an address related to the predetermined position of the second recording layer. It can also be achieved by a second recording apparatus, comprising a control device for controlling the recording device to prerecord the advance information as the recording information in a part of the area.

According to the second recording apparatus of the present invention, similarly to the first recording apparatus, recording information can be recorded on the recording medium by the operation of the recording device. Further, by the operation of the control device, prior information is recorded in a part of the area of the first area prior to the finalizing process.

In the second recording apparatus, in particular, from the position of the first recording layer corresponding to the end on the inner circumferential side and at least one end of the end on the outer circumferential side of the area portion of the second area in which no recording information is recorded, the tolerance corresponds to the tolerance length. Dictionary information is pre-recorded in the area part of the part of the first area except at least the area part having the size. That is, even when the end portion on the outer circumferential side of the first region and the end portion on the inner circumferential side of the second region do not correspond, the same advantages as the various advantages of the first recording apparatus can be obtained.

Therefore, according to the second recording apparatus of the present invention, similarly to the above-described first recording apparatus, even in an information recording medium having a plurality of recording layers, pre-recording for shortening the time required for the finalizing process can be preferably performed. have.

Incidentally, the second recording device of the present invention can also adopt various features in response to various features of the first recording device of the present invention described above.

(Recording method)

The above object of the present invention further provides (i) a first recording layer having a first area in which recording information is recorded by irradiation of a laser beam and the recording information is recorded, and (ii) the first recording layer. The recording information is recorded by irradiating the laser light through the recording medium, and the recording medium includes a second recording layer having a second area whose end portion on the inner circumferential side corresponds to the end portion on the outer circumference side of the first region. A recording method in a recording apparatus including a recording device for recording the record information by irradiation, comprising: a first control step of controlling the recording device to record the record information; And an allowable range of relative position shift between an address defined at a predetermined position of the first recording layer and an address related to the predetermined position of the second recording layer, starting from an end portion on the outer peripheral side of the first region. And a second control step of controlling the recording device to pre-record preliminary information as the record information in an area portion of a part of the first area except at least an area portion having a size corresponding to the tolerance length indicated, It can also be achieved by one recording method.

According to the first recording method of the present invention, the same advantages as the various advantages of the first recording apparatus of the present invention described above can be obtained.

Incidentally, in response to various aspects of the first recording apparatus of the present invention described above, the first recording method of the present invention can also adopt various aspects.

The above object of the present invention further provides (i) a first recording layer having a first area in which recording information is recorded by irradiation of a laser beam and the recording information is recorded, and (ii) the first recording layer. A second area having the second area in which the recording information is recorded by irradiating the laser light through the area portion in which the recording information is not recorded in the first recording layer, and the recording information is recorded by the laser light irradiation. A recording method in a recording apparatus comprising a recording device for recording the recording information by irradiation of the laser beam on a recording medium including two recording layers, comprising: a first control for controlling the recording device to record the recording information fair; And the first recording on the basis of the position of the first recording layer corresponding to at least one end of the end on the inner circumference side and the end on the outer circumference side of the portion of the area where the recording information is not recorded in the second area. Of the first region except at least a portion of the region having a size corresponding to a tolerance length indicating an allowable range of relative position shift between an address defined at a predetermined position of the layer and an address related to the predetermined position of the second recording layer. It can also be achieved by a second recording method, comprising a second control process of controlling the recording device to pre-record preliminary information as the record information in a part of the area.

According to the second recording method of the present invention, the same advantages as the various advantages of the above-described second recording apparatus of the present invention can be obtained.

Incidentally, in response to various aspects of the second recording apparatus of the present invention described above, the second recording method of the present invention can also adopt various aspects.

(Computer program)

The above object of the present invention is also a computer program for recording control for controlling a computer provided in the above-described first recording device or second recording device (including various forms thereof) of the present invention. It may also be achieved by a computer program which explicitly implements a program consisting of executable instructions and makes the computer function as at least part of the recording apparatus (specifically, for example, a control device).

According to the computer program of the present invention, the computer reads and executes the computer program from a program storage device such as a ROM, CD-ROM, DVD-ROM, and hard disk, or executes the computer program after downloading it through a communication device. The above-described first or second recording apparatus of the present invention can be realized relatively easily.

Incidentally, the computer program of the present invention can also adopt various aspects, corresponding to various aspects of the above-described first or second recording apparatus of the present invention.

The above object of the present invention also clearly implements a program comprising instructions executable by a computer provided in the above-described first recording device or second recording device (including various forms) of the present invention. Can also be achieved by means of a computer program product in a computer readable medium, which functions as at least part of the recording apparatus (specifically, for example, a control device).

According to the computer program product of the present invention, the computer program product is read from a recording medium such as a ROM, a CD-ROM, a DVD-ROM, a hard disk, or the like for storing the computer program product into a computer, or transferred, for example. By downloading a computer program product, which may correspond to a par, to a computer via a communication device, the above-described first or second recording apparatus of the present invention can be relatively easily implemented. More specifically, the computer program product may include computer readable code (or computer readable instructions) for causing the computer to function as the first recording device or the second recording device of the present invention described above.

These and other advantages of the present invention will become more apparent from the following examples.

As described above, the first recording apparatus or the second recording apparatus of the present invention includes a recording device and a control device. The first recording method or the second recording method of the present invention includes a first control process and a second control process. Therefore, also for an information recording medium having a plurality of recording layers, pre-recording for shortening the time required for the finalizing process can be preferably performed.

Fig. 1 is a schematic plan view showing the basic structure of an optical disc according to the present embodiment, and is a schematic conceptual view of a schematic sectional view of the optical disc and a corresponding recording area structure in its radial direction.

2 is a block diagram conceptually showing the basic configuration of a recording / reproducing apparatus according to the present embodiment.

3 is a flowchart conceptually showing the flow of the pre-recording operation in the middle region of the recording operation of the recording / reproducing apparatus according to the present embodiment.

4 is a schematic conceptual diagram conceptually illustrating positional tolerances.

5 is a schematic conceptual diagram conceptually showing an eccentric clearance among clearances.

6 is a schematic conceptual diagram conceptually illustrating spot clearance among clearances.

7 is a graph conceptually showing a specific example of the corresponding equation.

FIG. 8 is a schematic conceptual diagram schematically showing a relationship between addresses and respective areas on the optical disc when dummy data and the like are pre-recorded in the intermediate area.

FIG. 9 is a schematic conceptual diagram schematically showing a relationship between each area and an address on an optical disc when dummy data or the like is already recorded in an intermediate area.

Fig. 10 is a schematic conceptual diagram showing a specific address value of a DVD-R having a diameter of 12 cm, which is an example of an optical disk.

Fig. 11 is a schematic conceptual diagram showing a specific address value of a DVD-R having a diameter of 8 cm, which is another specific example of the optical disc.

12 is a flowchart conceptually showing the flow of a first modified operation example.

Fig. 13 is a schematic conceptual diagram schematically showing the relationship between each area and an address on the optical disc when dummy data and the like are pre-recorded in the intermediate area when ODTA is used.

Fig. 14 is a schematic conceptual diagram schematically showing the relationship between addresses and respective areas on the optical disc when dummy data or the like is already pre-recorded in the intermediate area when ODTA is used.

15 is a flowchart conceptually illustrating a flow of a second modification operation example.

Fig. 16 is a schematic conceptual diagram schematically showing a relationship between addresses and respective areas on the optical disc when dummy data or the like is pre-recorded in the intermediate area when ODTA is newly used.

EMBODIMENT OF THE INVENTION Hereinafter, each Example is described with reference to drawings in order for the best form for implementing this invention.

First, with reference to FIG. 1, an optical disc in which data is recorded and reproduced by the recording / reproducing apparatus 200 (see FIG. 2) as an embodiment of the recording apparatus of the present invention will be described. Here, Fig. 1A is a schematic plan view showing the basic structure of an optical disc according to the present embodiment, and Fig. 1B is a schematic cross sectional view of the optical disc, and a recording area in the radial direction corresponding thereto. Schematic conceptual diagram of the structure.

As shown in Figs. 1A and 1B, the optical disc 100 has a recording surface on a disc body of about 12 cm in diameter, for example, like a DVD. The optical disc 100 has a center hole 101 as a center, a lead-in area 102 or a lead-out area 118, and a data area 105 on its recording surface. 115, and intermediate regions 109 and 119 are provided. At this time, the intermediate region 109 constitutes one embodiment of the "first region" of the present invention. In the optical disc 100, a recording layer and the like are stacked on the transparent substrate 110. FIG. In each recording area of the recording layer, for example, tracks such as groove tracks and land tracks are alternately formed in a spiral or concentric shape with the center hole 101 as the center. have. Further, data is divided and recorded in units of ECC blocks on this track. The ECC block is a data management unit that can error correct record information.

Incidentally, the present invention is not particularly limited to the optical disc having three areas as described above. For example, even if the lead-in area 102, the lead-out area 118, or the intermediate area 109, 119 does not exist, the data structure described below can be constructed. In addition, as will be described later, the lead-in area 102 and the lead-out area 118 or the intermediate area 109 and 119 may be further subdivided.

In particular, the optical disc 100 according to the present embodiment includes an L0 layer constituting an example of a "first recording layer" and a "second recording layer" in the present invention, as shown in FIG. The L1 layer has a structure in which it is laminated on the transparent substrate 110. In the recording / reproducing of the two-layer type optical disc 100, in the L0 layer depending on which recording layer the condensing position of the laser light LB radiated from the lower side to the upper side in FIG. Recording / reproducing of the data, or recording / reproducing of data in the L1 layer. In particular, data is recorded from the inner circumference side to the outer circumference side in the L0 layer, while data is recorded from the outer circumference side to the inner circumference side in the L1 layer. That is, the optical disc 100 according to the present embodiment corresponds to an optical disc of the positive track path method. However, the parallel track path system optical disc can also achieve various advantages described below by employing the configuration described below.

In addition, the optical disc 100 according to the present embodiment includes RMAs (Recording Management Areas) 103 and 113 on the inner circumferential side of the lead-in area 102 and the lead-out area 118, In addition, outer disc testing areas (ODTAs) 104 and 114 are included on the outer circumferential side of the intermediate areas 109 and 119.

The RMAs 103 and 113 are recording areas for recording various management information for managing recording of data on the optical disc 100. Specifically, for example, arrangement or recording states of data recorded on the optical disc 100, etc. Management information indicating this is recorded.

The ODTAs 104 and 114 are recording areas for performing an OPC (Optimum Power Control) process of adjusting (correcting) the laser power of the laser light LB when recording data on the optical disc 100. By recording the OPC patterns in the ODTAs 104 and 114 while gradually changing the laser power, and measuring the reproduction quality (for example, asymmetry error, etc.) of the recorded OPC patterns, The optimal laser power is calculated. In particular, the ODTA 114 of the L1 layer constituting the exemplary embodiment of the "second region" of the present invention is disposed adjacent to the intermediate region 119, and the ODTA 114 of the L1 layer is the laser light LB. ) Is disposed so as not to overlap the ODTA 104 and the intermediate region 109 of the L0 layer from the irradiation side. Then, in order to preferably perform 0PC processing without being affected by other recording layers, when performing OPC processing using the ODTA 114 of the L1 layer, the OPC pattern is recorded through the L0 layer in which no data is recorded. Of course, the same applies to the ODTA 104 of the L0 layer.

In addition, the optical disc 100 according to the present embodiment is not limited to a single side dual layer but also a double side dual layer. In addition, the optical disk 100 according to the present embodiment is not limited to an optical disk having two recording layers as described above, and a multilayer optical disk of three or more layers is also possible.

(Recording / playback device)

Next, with reference to FIGS. 2-16, the structure and operation | movement of the recording / reproducing apparatus 200 as an Example regarding the recording apparatus of this invention are demonstrated.

(1) basic configuration

First, a basic configuration of the recording / reproducing apparatus 200 according to the present embodiment will be described with reference to FIG. 2. 2 is a block diagram conceptually showing the basic configuration of the recording / reproducing apparatus 200 according to the present embodiment. The recording / reproducing apparatus 200 has a function of recording data on the optical disc 100 and a function of reproducing data recorded on the optical disc 100.

As shown in Fig. 2, the recording / reproducing apparatus 200 is a disk drive 300 in which an optical disc 100 is actually loaded so that data recording or data reproduction is performed, and data of the data for the disk drive 300 is stored. A host computer 400 such as a personal computer for controlling recording and reproduction is provided.

The disc drive 300 includes an optical disc 100, a spindle motor 351, an optical pickup 352, a signal recording / reproducing device 353, a CPU (drive control device) 354, a memory 355, and data input / output control. It comprises a device 306 and a bus 357. In addition, the host computer 400 includes a CPU 359, a memory 360, an operation / display control device 307, an operation button 310, a display panel 311, and a data input / output control device 308. do.

The spindle motor 351 rotates and stops the optical disc 100, and operates when the optical disc 100 is accessed. More specifically, the spindle motor 351 is configured to rotate and stop the optical disc 100 at a predetermined speed under spindle servo from a servo unit or the like not shown.

The optical pickup 352 constitutes one embodiment of the "recording device" in the present invention, and is composed of, for example, a semiconductor laser device, a lens, and the like for recording / reproducing the optical disk 100. More specifically, the optical pickup 352 irradiates the optical disc 100 with a light beam such as a laser beam at the first power as the read light at the time of reproduction, and at the second power as the write light at the time of recording, and modulates the optical disc 100 with the second power. Investigate

The signal recording / reproducing device 353 performs recording / reproducing on the optical disc 100 by controlling the spindle motor 351 and the optical pickup 352. More specifically, the signal recording / reproducing device 353 is constituted by, for example, a laser diode (LD) driver and a head amplifier. The laser diode driver (LD driver) drives a semiconductor laser (not shown) installed in the optical pickup 352. The head amplifier amplifies the output signal of the optical pickup 352, that is, the reflected light of the light beam, and outputs the amplified signal. More specifically, the signal recording / reproducing device 353 determines the optimum laser power by the recording and reproducing process of the OPC pattern, together with a timing generator (not shown) and the like under the control of the CPU 354 during the OPC process. To do this, a semiconductor laser device (not shown) provided in the optical pickup 352 is driven.

The memory 355 is a disk drive 300 including a buffer area for recording / reproducing data, an area used as an intermediate buffer when converting data into data that can be used in the signal recording / reproducing device 353, and the like. It is used in overall data processing and OPC processing. The memory 355 also includes a program for performing operations as these recording devices, that is, a ROM area in which firmware is stored, a buffer area for temporarily storing recording / reproducing data, a RAM area in which variables necessary for an operation such as a firmware program are stored, and the like. It consists of.

The CPU (drive control device) 354 is connected to the signal recording / reproducing device 353 and the memory 355 via the bus 357, and instructs various control devices to control the entire disk drive 300. Do it. Typically, software or firmware for operating the CPU 354 is stored in the memory 355.

The data input / output control device 306 controls the input / output of data from the outside to the disk drive 30O, and stores and retrieves the data buffer on the memory 355. Drive control commands issued from an external host computer 400 connected to the disk drive 300 via an interface such as SCSI or ATAPI are transmitted to the CPU 354 via the data input / output control device 306. Similarly, recording / reproducing data is also transmitted and received with the host computer 400 via the data input / output control device 306.

The operation / display control device 307 receives and displays an operation instruction to the host computer 400 and transmits an instruction by the operation button 310 such as an instruction for recording or reproduction to the CPU 359. The CPU 359 transmits a control command to the disk drive 300 via the data input / output control device 308 on the basis of the instruction information from the operation / display control device 307, and the disk drive. 300 to control the whole. Similarly, the CPU 359 can send a command to the disk drive 300 to request the host to send an operating state. As a result, since the operation state of the disk drive 300 being recorded or reproduced can be grasped, the CPU 359 can display the display panel such as a fluorescent tube and an LCD through the operation / display control device 307. The operation state of the disk drive 300 may be output to 311.

The memory 360 is an internal storage device used by the host computer 400, for example, a ROM area in which a firmware program such as a basic input / output system (BIOS) is stored, an operating system, an application program, or the like. It is composed of a RAM area for storing variables required for the operation. The memory 360 may be connected to an external storage device (not shown) such as a hard disk via the data input / output control device 308.

As described above, one embodiment in which the disk drive 300 and the host computer 400 are used in combination is a household device such as a recorder device for recording / reproducing video. This recorder device records video signals from a broadcast reception tuner and external connection terminals on a disc, and outputs the video signals reproduced from the disc to an external display device such as a television. The operation as the recorder device is performed by executing the program stored in the memory 360 with the CPU 359. In another embodiment, the disk drive 300 is a disk drive (hereinafter referred to as a drive as needed), and the host computer 400 is a personal computer or workstation. A host computer such as a personal computer and a drive are connected via data input / output control devices 306 and 308 such as SCSI and ATAPI, and an application such as writing software installed in the host computer 400 controls the disk drive 300. To control.

(2) operating principle

Next, the recording operation of the recording / reproducing apparatus 200 according to the present embodiment will be described with reference to FIGS. 3 to 11. Here, the overall outline of the operation principle will be described with reference to FIG. 3, and this will be supplementarily described or described in more detail with reference to FIGS. 3 is a flowchart conceptually showing the flow of the pre-recording operation to the intermediate regions 109 and 119 during the recording operation of the recording / reproducing apparatus 200 according to the present embodiment.

The recording / reproducing apparatus 200 records movie data, music data, PC data, and the like in the data areas 105 and 115. At this time, in principle, data is recorded in the data area 115 of the L1 layer after data is recorded in the data area 105 of the L0 layer. That is, the recording / reproducing apparatus 200 records data in the data area 115 of the L1 layer by irradiating the laser light LB to the L1 layer through the data area 105 of the L0 layer where data has already been recorded. The same holds true for the other recording areas. At this time, the recording / reproducing apparatus 200 pre-records dummy data (for example, "OOh" data, etc.) and the like in the intermediate regions 109 and 119 as appropriate. This prior recording will be described below.

As shown in Fig. 3, under the control of the CPU 354 or 359 constituting an exemplary embodiment of the "control device" in the present invention, first, positional tolerances of the L0 layer and the L1 layer are acquired (step S101). ). And instead of acquiring position tolerance, you may acquire the tolerance value in the specification of a position tolerance as a position tolerance. The position tolerance is a value of the position shift or the allowable range of the position shift between a position where a predetermined address in a design is to be originally arranged and a position where a predetermined address is actually disposed on the optical disc 100. Here, the positional tolerance will be described in more detail with reference to FIG. 4. 4 is a schematic conceptual diagram conceptually illustrating positional tolerances.

As shown in Fig. 4A, the address "X" is defined at the radial position "r" in the design. Thereby, the arrangement of the lead-in area 101, the data areas 105 and 115, the lead-out area 118, or the intermediate areas 109 and 119 in the design is defined. At this time, a manufacturing error such as a stamper for forming a land pre-pit or wobble defining an address, in other words, a manufacturing error of an original disk for manufacturing a stamper, the original disk Due to an error in the radial position of the cutting machine for producing a, uneven track pitch, or the like, the address "X" may not be precisely defined in the radial position "r" to be originally defined. Alternatively, due to individual differences due to heat shrinkage or the like when the optical disc 100 is manufactured, the address "X" may not be precisely defined at the radial position "r" to be originally defined.

Specifically, as shown in Fig. 4B, the address "X + ΔX" is sometimes defined at the radial position "r" where the original address "X" should be defined. At this time, the address "X" is defined at the radial position "r-Δr1" shifted to the inner circumferential side by "Δr1" rather than the radial position "r". The value of "Δr1" or the allowable range of "Δr1" at this time is called positional tolerance. Since this positional tolerance is caused for each recording layer, the positional tolerance is obtained for both the L0 layer and the L1 layer in step S101 of FIG. And if the state of FIG. 4 (b) shows the state which caused the position tolerance, FIG. 4 (a) is a figure which shows the state where the position tolerance is "0".

3 again, under the control of the CPU 354 or 359, the interlayer tolerance constituting an embodiment of the "tolerance length" of the present invention by summing the positional tolerances of the L0 layer and the L1 layer acquired in step S101 again. (layer tolerance) is calculated (step S102). That is, the "interlayer tolerance" means (i) an address to be defined at a predetermined radial position of the L0 layer, and (ii) an address related to a predetermined radial position of the L1 layer (in other words, to be defined at a predetermined radial position of the L1 layer). The allowable range (or position shift itself) of relative position shift between addresses) is shown.

Then, a clearance is calculated (step S103). Specifically, the clearance related to the eccentricity (hereinafter referred to as "eccentric clearance" suitably) corresponding to the shift | offset | difference of the center position, etc. of L0 layer and L1 layer, and the clearance which concerns on the magnitude | size of the beam spot of the defocused laser beam (Hereinafter, referred to as "spot clearance" as appropriate) is calculated and summed. Here, the clearance will be described with reference to FIGS. 5 and 6. Here, FIG. 5 is a schematic conceptual diagram conceptually illustrating eccentric clearance among clearances, and FIG. 6 is a schematic conceptual diagram conceptually illustrating spot clearance among clearances.

As shown in Fig. 5A, in the case of the optical disc 100 in which there is no eccentricity, the address " X " specified in the radial position " r " of the LO layer and the radial position " r " The addresses "Y" are in opposite (or opposite) relation to each other on a track of radius "r". In addition, eccentricity shows the relative shift | offset | difference of L0 layer and L1 layer which generate | occur | produce by the shift | offset of the center position of each layer, and the position shift of the center position at the time of joining L0 layer and L1 layer.

On the other hand, as shown in Fig. 5B, in the optical disk 100 in which the eccentricity exists, the address " X " defined in the radial position " r " of the LO layer and the radial position " r " The address "Y" only faces two points on the track of radius "r". That is, the address " X " of the L0 layer and the address " Y " of the L1 layer, which should be originally defined at the opposite positions, do not face in most places. Specifically, the sum of the eccentricity of the L0 layer and the L1 layer corresponds to the eccentric clearance. In the case of Fig. 5B, the address "X" of the LO layer is located at a position shifted by "Δr2" corresponding to the amount of eccentricity to the outer peripheral side with respect to the address "Y" of the L1 layer. The maximum value of "Δr2" corresponds to the eccentric clearance.

As shown in Fig. 6A, when the laser light LB is focused on the L1 layer, a beam spot having a predetermined radius "Δr3" is formed on the LO layer. At this time, as described above, consider a case where data is recorded in the L1 layer by irradiating the laser light LB to the L1 layer through the L0 layer in which data is recorded. As shown in Fig. 6A, when data is recorded up to address " X " in the L0 layer, the laser beam LB focuses on the address " Y " In this case, the left half of the laser light LB is irradiated to the L1 layer through the L0 layer where data is recorded, while the right half of the laser light LB is irradiated to the L1 layer through the L0 layer where no data is recorded. . Therefore, without considering the above case, only by recording the data in the L1 layer facing the L0 layer on which the data is recorded, the L1 layer is irradiated by irradiating the laser beam LB through the L0 layer on which the data is recorded. It is not possible to record data preferably.

Therefore, as shown in Fig. 6B, the focus position of the laser beam LB in the case of recording data in the L1 layer is the address of the L1 layer facing the address " X " From the position indicated by "Y", it is necessary to shift to the inner peripheral side by a distance corresponding to the radius "Δr3" of the beam spot. Specifically, it is necessary to focus the laser beam LB on the position indicated by the address "Y-ΔX" obtained by shifting the inner peripheral side by the variable "ΔX" of the address corresponding to the radius "Δr3" of the beam spot. The maximum value of the radius "Δ3" of this beam spot corresponds to the spot clearance.

In step S103 of FIG. 3, the clearance is calculated by summing the eccentric clearance described in FIG. 5 and the spot clearance described in FIG. 6.

3 again, under the control of the CPU 354 or 359, the sum " L " of the interlayer tolerance calculated in step S102 and the clearance calculated in step S103 is calculated (step S104). Subsequently, under the control of the CPU 354 or 359, the outermost circumferential address of the middle region 109 of the L0 layer (i.e., the address of the end of the outer circumferential side) is obtained (step S105). Subsequently, under the control of the CPU 354 or 359, the address located at the point shifted toward the inner circumferential side by the distance "L" from the position indicated by the address "C" according to the corresponding equation is the address "where the pre-recording is completed". It is calculated as B "(step S106). At this time, since the outermost circumferential position of the intermediate region 109 and the innermost circumferential position of the ODTA 114 (i.e., the end portion of the inner circumferential side) have a corresponding relationship (i.e., because the design is defined at the opposite position), in other words, Then, an address located at a point shifted from the position of the L0 layer corresponding to the innermost circumference position of the ODTA 114 by the distance "L" toward the inner circumference side is calculated as the address "B". The correspondence equation used in step S106 indicates a correspondence relationship between the size of the recording area (for example, the distance in the radial direction) and the size of the data (for example, the number of ECC blocks) recorded in the recording area. This correspondence expression is demonstrated in detail with reference to FIG. 7 is a graph conceptually showing a specific example of the corresponding equation.

As shown in Fig. 7, the correspondence equation is represented by a graph (or a function), in which a horizontal distance "L" is assigned to the horizontal axis, and the number of ECC blocks is assigned to the vertical axis. At this time, a plurality of graphs in accordance with the type of the optical disc 100 may be defined as the corresponding equations. For example, as shown in FIG. 7, according to the size of the optical disc 100, a correspondence equation (e.g., ECC block number = 5.422 x L) and an correspondence equation on an optical disc of 8 cm in diameter according to the size of the optical disc 100 (E.g., ECC block number = 3.5687 x L) may be defined. From this graph, the size of data that can be recorded in the recording area with the distance "L" in the radial direction can be obtained. For example, if " L = 124 mu m ", data of 675 ECC block size can be recorded on an optical disk having a diameter of 12 cm, and data of 443 ECC block size can be recorded on an optical disk having a diameter of 8 cm.

Incidentally, this correspondence may be stored in advance in the memory 355 or 360 in the recording / reproducing apparatus 200 constituting an example of the "storage device" of the present invention, or may be recorded in advance in the optical disc 100. . It is to be understood that the corresponding equation is not limited to the one shown in FIG. 7. For example, a predetermined table is also possible. The point can be used in the above-described correspondence as long as it is information defining a relationship between the distance in the radial direction and the size of data that can be recorded in the distance.

The size of data that can be recorded in the recording area in which the distance in the radial direction "L" obtained using the correspondence formula of FIG. 7 is used when calculating the address B. FIG. This is because the recording / reproducing apparatus 200 cannot easily calculate the address "B" even if "L" is obtained only as the distance in the radial direction. This is because the recording / reproducing apparatus 200 hardly recognizes the positions of the recording areas of the L0 layer and the L1 layer by the "distance in the radial direction", but by the address position. At this time, since data of a predetermined size is recorded in a predetermined address range, it is sufficient for the recording / reproducing apparatus 200 to recognize the distance "L" in the radial direction as the size of the data. If the recording / reproducing apparatus 200 recognizes the distance "L" in the radial direction as the size of data that can be recorded in the recording area in which the distance in the radial direction is "L", the position from the address "C" The address " B " can be calculated relatively easily by shifting the inner peripheral side by an address corresponding to the size thereof.

In FIG. 3 again, Recording Management Data (RMD) recorded in the RMA (Recording Management Area) 103 (113) is then obtained (step S107). The RMD includes information indicating the recording state of data on the optical disc 100 (i.e., in which recording area data is recorded or in which recording area data is not recorded).

Subsequently, under the control of the CPU 354 or 359, it is determined whether or not the dummy data or the like has already been recorded in the intermediate region 109 of the L0 layer (step S108). This determination is made based on the RMD acquired in step S107.

As a result of this determination, when it is determined that dummy data or the like is not previously recorded in the intermediate region 109 of the LO layer (step S108: NO), it is allocated to a land pre-pit or the like under the control of the CPU 354 or 359. The address next to the outermost address value of the existing data area 105 (that is, the innermost address of the middle area 109) is obtained as the address " A " in which the prerecording is started (step S109). On the other hand, when it is determined that dummy data or the like has been previously recorded in the intermediate region 109 of the L0 layer (step S108: YES), based on the RMD acquired in step S107 under the control of the CPU 354 or 359, The next address value of the outermost address (i.e., the outermost address of the recording area in which the dummy data or the like is pre-recorded in the intermediate area 109), such as dummy data, which is recorded in advance, is obtained as the address "A" ( Step S110).

Next, under the control of the CPU 354 or 359, it is determined whether or not the address "B" calculated in step S106 is located on the outer circumferential side than the address "A" obtained in step S109 or step S110 (step S111).

As a result of this determination, when it is determined that the address "B" is located on the outer circumferential side of the address "A" (step S111: Yes), in the middle area 109 of the L0 layer under the control of the CPU 354 or 359. The predetermined dummy data or the like is pre-recorded in the recording area from the address "A" to the address "B" (step S112). On the other hand, when it is determined that the address "B" is not located on the outer circumferential side of the address "A" (step S111: No), the dummy data is stored in the middle region 109 of the L0 layer under the control of the CPU 354 or 359. Etc. are not pre-recorded.

Features on the optical disc 100 at this time will be described with reference to FIGS. 8 and 9. FIG. 8 is a schematic conceptual diagram schematically showing a relationship between each area and an address on the optical disc 100 when dummy data or the like is pre-recorded in the intermediate area 109. FIG. 9 is a schematic conceptual diagram schematically showing a relationship between each area and an address on the optical disc 100 when dummy data or the like is already recorded in the intermediate area 109 in advance.

As shown in Fig. 8, when dummy data has not been previously recorded in the intermediate region 109, the innermost address of the intermediate region 109 of the L0 layer corresponds to the address "A", and the intermediate region of the L0 layer. The outermost peripheral address of 109 corresponds to the address "C", and the address of the position obtained by shifting the inner peripheral side by a distance "L" from the edge portion of the outer peripheral side of the middle region 109 of the L0 layer is an address. It corresponds to "B". Under the control of the CPU 354 or 359, dummy data is pre-recorded in the recording area from the address "A" to the address "B" in the middle area 109. At this time, as shown in FIG. 8, the OPC pattern can be recorded in the ODTA 114 of the L1 layer by irradiating the L1 layer with the laser light LB through the L0 layer where no data is recorded. In other words, when the OPC pattern is recorded in the ODTA 114 of the L1 layer, the laser light LB is not irradiated through the L0 layer in which data is recorded. In particular, as described above, in consideration of the interlayer tolerance and clearance, the recording area as part of the intermediate area 109 in which dummy data and the like is pre-recorded is determined. That is, after securing margin considering both interlayer tolerance and clearance, dummy data and the like are recorded in the intermediate region 109. Therefore, even if the occurrence of eccentricity and positional tolerance causes relative positional shift between the L0 layer and the L1 layer, regardless of the presence or absence of dummy data previously recorded in the intermediate region 109, through the LO layer where no data is recorded. By irradiating the laser light LB to the L1 layer, the OPC pattern can be recorded in the ODTA 114 of the L1 layer.

8 shows an eccentricity in which the center of the LO layer is shifted to the outer circumferential side compared to the center of the L1 layer, a position tolerance in which the middle region 109 of the L0 layer is shifted to the outer circumferential side, and the ODTA 114 of the L1 layer is shifted to the inner circumferential side. The case where the position tolerance which arises is caused is shown. That is, the worst case where the intermediate region 109 of the L0 layer and the ODTA 114 of the L1 layer is most overlapped is shown. Even in the worst case, when dummy data or the like is pre-recorded in the intermediate region 109 in consideration of the interlayer tolerance and clearance as described above, as shown in FIG. 8, the laser beam LB through the L0 layer where no data is recorded. By irradiating) to the L1 layer, the OPC pattern can be recorded in the ODTA 114 of the L1 layer.

In addition, as shown in Fig. 9, when dummy data or the like is already pre-recorded in a part of the intermediate region 109, the address next to the outermost peripheral address of the recording area where the dummy data or the like is pre-recorded is address "A". ", The outermost peripheral address of the middle region 109 of the L0 layer corresponds to the address" C ", and is obtained by shifting the inner peripheral side by a distance" L "from the end of the outer peripheral side of the middle region 109 of the LO layer. The address of the position corresponds to the address "B". Then, under the control of the CPU 354 or 359, dummy data or the like is pre-recorded in the recording area from the address "A" to the address "B" in the middle area 109. Also in this case, similarly to the case of Fig. 8, even if the relative positional shift between the L0 layer and the L1 layer is caused by the occurrence of eccentricity and position tolerance, regardless of the presence or absence of dummy data previously recorded in the intermediate region 109, By irradiating the laser light LB to the L1 layer through the L0 layer where no data is recorded, the OPC pattern can be recorded in the ODTA 114 of the L1 layer.

When the value of the specific address is applied, it is as shown in FIG. 10 and FIG. FIG. 10 is a schematic conceptual view showing a specific address value in a DVD-R having a diameter of 12 cm, which is an example of an optical disk 100, and FIG. 11 is a schematic conceptual diagram showing a DVD-R having a diameter of 8 cm, which is another specific example of an optical disk 100. As shown in FIG. to be.

10 and 11, "40 micrometers" is used as a specific numerical value of the interlayer tolerance, in accordance with "20 micrometers" which is a standard allowable range of positional tolerances for each recording layer. In addition, "84 micrometers" is used as a specific numerical value of clearance. That is, the specific example in the case of L = 84 + 40 = 124 micrometers is demonstrated. 10 and 11 show a case where a decrement address method is adopted in which the address decreases toward the outer circumferential side in the L0 layer and decreases in the address toward the inner circumferential side in the L1 layer. Of course, in the case of the incremental address method in which the address increases toward the outer circumferential side in the L0 layer and the address increases toward the inner circumferential side in the L1 layer, the specific value is different.

As shown in Fig. 10, in the case of a DVD-R having a diameter of 12 cm, the address "A" (ie, the innermost address of the middle region 109 of the L0 layer) is "FDD109h" and the address "C" (ie, L1). The position of the L0 layer corresponding to the innermost position of the ODTA 114 of the layer) is "FDCCCAh". The size of data that can be recorded in the recording area in which the distance in the radial direction is L = 124 µm is found to be 675 ECC blocks (= 2A3hECC blocks) from the graph of FIG. Therefore, the address "B" becomes "FDCCCAh" + "2A3h" = "FDCF6Dh". For reference, the innermost address of the middle region 119 of the L1 layer is "022EF6h", and the innermost address of the ODTA 114 of the L1 layer is "023574h".

11, in the case of DVD-R having a diameter of 8 cm, the address "A" is "FF3030h" and the address "C" is "FF2D67h". The size of data that can be recorded in the recording area in which the distance in the radial direction is L = 124 µm is found to be 443 ECC blocks (= 1BBhECC blocks) from the graph of FIG. Therefore, the address "B" is "FF2D67h" + "1BBh" = "FF2F22h". For reference, the innermost address of the middle region 119 of the L1 layer is "00CFCFh", and the innermost address of the ODTA 114 of the L1 layer is "00D4D7h".

10 and 11 show a case where the intermediate regions 109 and 119 are arranged at predetermined positions in the standard. However, if the size of the data recorded in the data areas 105 and 115 is small, the intermediate areas 109 and 119 can also be configured to be located on the inner circumferential side.

As described above, according to the recording / reproducing apparatus 200 according to the present embodiment, in consideration of the interlayer tolerance and clearance, the intermediate in which dummy data or the like is recorded without affecting the recording of the OPC pattern to the ODTA 114. A portion of the recording area of the area 109 is determined. Therefore, even if the occurrence of eccentricity and positional tolerance causes relative positional shift between the L0 layer and the L1 layer, irrespective of the presence or absence of dummy data previously recorded in the intermediate region 109, the L0 layer where no data is recorded is stored. By irradiating the laser light LB to the L1 layer, the OPC pattern can be recorded in the ODTA 114 of the L1 layer. Therefore, by using the ODTA 114, it becomes possible to perform OPC processing preferably.

In addition, since the dummy data or the like can be pre-recorded in the intermediate region 109 before the finalizing process, the time required for the finalizing process can be shortened. In summary, according to the recording / reproducing apparatus 200 according to the present embodiment, the existing recording / reproducing apparatus which shortens the time required for the finalizing processing and does not adversely affect the OPC processing using the ODTA 114 in the conventional recording / reproducing apparatus. It has a big advantage not realized.

In addition, according to the recording / reproducing apparatus 200 according to the present embodiment, the address position (specifically, address ") is recorded in units of data recording based on the correspondence formula shown in FIG. 7 and the like, rather than the radial distance of the optical disc 100. B ") is calculated. Therefore, the above-described pre-recording can be performed in a format that the recording / reproducing apparatus 200 is not easy to recognize or handle. Therefore, the processing load required for the recording operation of the recording / reproducing apparatus 200 can be reduced.

In addition, using a plurality of correspondences, part of the intermediate area 109 capable of pre-recording dummy data according to the type of the optical disc 100 (for example, depending on the size of the diameter or the difference in size). The recording area can be determined. Alternatively, depending on the position where the intermediate region 109 is disposed (for example, the intermediate region 109 is located on the relatively inner circumferential side, the relatively circumferential side, or the relatively outer circumferential side of the optical disc 100). The recording area of a part of the intermediate area 109 in which the dummy data and the like can be pre-recorded.

Incidentally, in the above-described embodiment, although the pre-recording in the intermediate region 109 of the LO layer has been described, the present invention can also be applied to the case where the dummy data or the like is pre-recorded in the lead-in area 102 of the L0 layer. That is, it is necessary to record data through the unrecorded L0 layer in the recording area of the L1 layer (or the recording area adjacent to the recording area of the corresponding L1 layer) corresponding to the lead-in area 102 or the like of the L0 layer. If there is a recording area, a recording area of a part of the lead-in area 102 or the like in which dummy data or the like can be prerecorded can be determined as described above. The same applies to the intermediate region 119 and the lead-out region 118 of the L1 layer.

(First Modified Operation Example)

Next, a description will be given of a first modified operation example of the recording / reproducing apparatus 200 according to the present embodiment with reference to FIG. 12 is a flowchart conceptually showing the flow of a first modified operation example. Incidentally, the same reference numerals and step numbers will be given to the same components and processes as those described in the operations in FIGS. 3 to 10, and detailed description thereof will be omitted.

The first modification operation example is an operation example in which dummy data is pre-recorded in the intermediate region 109 when an OPC pattern or the like is already recorded in the ODTA 114 of the L1 layer in advance. As shown in Fig. 12, steps 101 to S110 in Fig. 3 are similarly performed in the first modification operation example.

Subsequently, under the control of the CPU 354 or 359, it is determined whether the ODTA 114 (or a part thereof) of the L1 layer is already used (i.e., whether the OPC pattern or the like has already been recorded) (step) S201).

As a result of this determination, when it is determined that the ODTA 114 of the L1 layer is already used (step S201: YES), by referring to the RMD acquired in step S107, for example, under the control of the CPU 354 or 359, The outermost address (ie, the outermost address of the recording area in which the OPC pattern or the like is recorded) of the ODTA 114 that is already being used is obtained (E) (step S202). Subsequently, the outermost circumferential address "D" of the intermediate region 119 of the L1 layer assigned to the land pre-pit or the like or predetermined in advance is obtained (step S203).

Then, from the difference between the address "D" and the address "E", the size "M" of the data that can be recorded in the recording area between the address "D" and the address "E" is calculated (step S204). That is, the size of the recording area (or the size of the recorded OPC pattern) already used in the ODTA 114 of the L1 layer is calculated. For example, if the reduction address system is adopted, M = E-D. Then, from the address "B" calculated in step S106, the address value of the position acquired by shifting to the outer peripheral side by the size "M" of data is calculated as a new address "B" (step S205). For example, if the reduction address system is adopted, B = B-M. On the other hand, if the incremental address method is adopted, B = B + M. In other words, the address value of the position obtained by shifting the inner peripheral side by "L" from the address of the position of the L0 layer corresponding to the position of the L1 layer specified by the address "E" is calculated in step S205. Corresponds to Thereafter, steps S111 and S112 in Fig. 3 are executed, and predetermined dummy data is pre-recorded in the recording areas of addresses " A " to " B " in the middle region 109 of the L0 layer.

On the other hand, when it is determined that the ODTA 114 of the L1 layer is not yet used (i.e., unused) (step S201: NO), steps S111 and S112 of Fig. 3 are performed without the operations of the above-described steps S202 to S205. Then, predetermined dummy data is pre-recorded in the recording areas of addresses "A" to "B" in the middle area 109 of the L0 layer.

Features on the optical disc 100 at this time will be described with reference to FIGS. 13 and 14. FIG. 13 is a schematic conceptual diagram schematically showing the relationship between each area and the address on the optical disc 100 when dummy data or the like is pre-recorded in the intermediate area 109 when the ODTA 114 is used. FIG. 14 is a schematic conceptual diagram schematically showing the relationship between each area and the address on the optical disc 100 when dummy data or the like is already recorded in the intermediate area 109 when the ODTA 114 is used. to be.

As shown in Fig. 13, the innermost address of the middle region 109 of the L0 layer corresponds to the address "A", and the outermost address of the middle region 109 of the L0 layer corresponds to the address "C". The address of the position shifted from the end of the outer peripheral side of the middle region 109 of the L0 layer to the inner peripheral side by the distance "L" and shifted to the outer peripheral side by the size "M" of the data corresponds to the address "B". This means that if a part of the recording area of the ODTA 114 in the L1 layer is used, the laser beam LB is passed through the L0 layer where no data is recorded for the recording area of the ODTA 114 except for the part of the recording area. This is because it is sufficient to be able to record the OPC pattern or the like by examining. That is, since a part of the recording area of the ODTA 114 of the L1 layer is used, even if dummy data is recorded to the outer peripheral side, it does not adversely affect the recording of the OPC pattern to the ODTA which has not been used yet. Then, under the control of the CPU 354 or 359, dummy data is pre-recorded in the recording area from the address "A" to the address "B" in the middle area 109.

As shown in Fig. 14, even when dummy data is previously recorded in the intermediate region 109, the size " M " of the recording area of the ODTA 114 of the L1 layer already used as described above is taken into consideration. Of course, the dummy data and the like may be recorded in advance.

As described above, according to the first modification operation example, even when the ODTA 114 (or a part thereof) has already been used, the finalization is not performed without adversely affecting the OPC processing performed using the ODTA 114. Prior to the processing, a recording area of a part of the intermediate area 109 capable of pre-recording dummy data can be determined. Thus, the above-described various advantages can be obtained.

(Second modification operation example)

Next, referring to FIG. 15, a second modified operation example of the recording / reproducing apparatus 200 according to the present embodiment will be described. 15 is a flowchart conceptually showing the flow of a second modified operation example. The same components and processes as those in the operations described with reference to FIGS. 3 to 10 are denoted by the same reference numerals and step numbers, and detailed description thereof will be omitted.

The second modified operation example is an operation example in which dummy data is pre-recorded in the intermediate region 109 when the recording / reproducing apparatus 200 itself records a new OPC pattern in the ODTA 114 of the L1 layer.

As shown in Fig. 15, the outermost address of the recording area of the ODTA 114 used in the past (i.e., the outermost address of the recording area of the ODTA 114 in which the OPC pattern or the like was recorded in the past) is acquired. (Step S301). More specifically, the outermost circumferential address " E " of the recording area of the ODTA 114 already in use before recording the OPC pattern at this time is obtained.

Subsequently, under the control of the CPU 354 or 359, it is determined whether the ODTA 114 of the L1 layer is newly used (that is, whether an OPC pattern or the like has been newly recorded in the ODTA 114 of the L1 layer). (Step S302).

As a result of this determination, when it is determined that the ODTA 114 of the L1 layer is newly used (step S302: Yes), the outermost address (final address) of the recording area of the newly used ODTA 114 of the L1 layer " F "is acquired (step S303). Subsequently, in the middle area 109 of the L0 layer, an address "B" next to the outermost peripheral address of the recording area in which dummy data or the like is already recorded is obtained (step S304). Then, from the difference between the address "E" and the address "F", the size "N" of the data that can be recorded in the recording area between the address "E" and the address "F" is calculated (step S305). In other words, the size of the recording area newly used among the ODTAs 114 of the L1 layer is calculated. For example, if the reduction address system is adopted, N = F-E. On the other hand, if the incremental address method is adopted, N = E-F. Next, from the address "B" calculated in step S304, the address "G" of the position shifted to the outer peripheral side by the size "N" of data is calculated (step S306). For example, if the reduction address system is adopted, G = B-N. On the other hand, if the incremental address method is adopted, G = B + N. Thereafter, predetermined dummy data is pre-recorded in the recording area from the address "B" to the address "G" in the middle area 109 of the L0 layer.

On the other hand, when it is determined that the ODTA 114 of the L1 layer is not newly used (step S302: NO), pre-recording such as dummy data in the intermediate region 109 is not performed.

Features on the optical disc 100 at this time will be described with reference to FIG. FIG. 16 is a schematic conceptual diagram schematically showing the relationship between each area and the address on the optical disc 100 when the dummy data or the like is pre-recorded in the intermediate area when the ODTA 114 is newly used.

As shown in Fig. 16, of the ODTA 114, the outermost circumferential address of the recording area already used before the use of this ODTA 114 corresponds to the address " E ". In the ODTA 114, the outermost peripheral address of the recording area newly used this time corresponds to the address "F". Among the intermediate areas 109, an address next to the outermost peripheral address of the recording area in which dummy data or the like has been previously recorded before this pre-recording corresponds to the address "B". The address of the position shifted from the position indicated by the address "B" to the outer circumferential side by the size "N" corresponds to the address "G". With the new use of the ODTA 114, dummy data and the like are newly recorded in the recording area from the address "B" to the address "G". That is, dummy data or the like having a size equivalent to the current use size of the ODTA 114 is newly recorded in the intermediate area 109 in advance.

As described above, according to the second modified operation example, it is possible to determine a part of the recording area of the intermediate area 109 where the dummy data can be pre-recorded before the finalizing process. Therefore, the various advantages described above can be obtained. In particular, depending on the size of the newly used ODTA 114, it is possible to determine a recording area of a part of the intermediate area 109 that can be newly prerecorded. Therefore, unnecessary pre-recording is not required, and the processing load of the recording / reproducing apparatus 200 can be reduced.

Incidentally, in the above-described embodiment, the optical disc 100 has been described as an example of a recording medium, and the recorder or player related to the optical disc 100 has been described as an example of a recording / reproducing apparatus, but the present invention is not limited to the optical disc and the recorder thereof. In addition, the present invention can be applied to various recording media and their recorders or players that support high density recording or high transfer rate.

The present invention is not limited to the above-described embodiments, and may be changed as necessary without departing from the spirit or spirit of the invention as seen from the claims and the entirety of the specification, and a recording apparatus with such a change, The recording method and the computer program for recording control are also included in the technical scope of the present invention.

The recording apparatus, recording method, and computer program according to the present invention can be used for, for example, a high density recording medium such as a DVD, and can also be used for an information recording apparatus such as a DVD recorder. Moreover, it can be used also in the information recording apparatus etc. which are mounted in the various computer apparatuses for home or office use, or can be connected to various computer apparatuses, for example.

Claims (19)

In the recording apparatus, (i) recording information is recorded by irradiation of a laser beam, and has a first recording layer having a first area in which the recording information is recorded, and (ii) the laser beam is irradiated through the first recording layer to thereby record the recording information. Is recorded, the recording medium comprising a second recording layer having a second area whose edge on the inner circumferential side has a second area corresponding to the edge on the outer circumferential side of the first area. A recording device for recording; And A relative position shift between an address defined at a predetermined position of the first recording layer and an address related to the predetermined position of the second recording layer, with the end of the outer peripheral side of the first area as a starting point. The recording device such that pre-information is pre-recorded as the recording information in an area part of the part of the first area except at least an area part having a size corresponding to a tolerance length indicating a tolerance range; Controlling device to control Recording device comprising a The method of claim 1, And the recording information is recorded in the second area through the first recording layer in which the recording information is not recorded. The method of claim 1, In addition to the area portion corresponding to the tolerance length, the control device further includes (i) the spot radius of the laser light on the first recording layer when the focus of the laser light is focused on the second recording layer, and (ii) The first area except for an area portion having a size corresponding to a clearance length representing the sum of the allowable ranges of the respective relative eccentric shift or the eccentric shift of the first recording layer and the second recording layer. And the recording device to control to record the dictionary information in advance in an area portion of a part of the apparatus. The method of claim 1, A conversion device for converting the tolerance length into a recording unit of the recording information, The control device controls the recording device to record the dictionary information in advance in an area part of a part of the first area except at least an area part having a size corresponding to the tolerance length converted into the recording unit, Recording device. The method of claim 4, wherein The conversion device determines the tolerance length based on the correspondence information defining the correspondence relationship between the tolerance length and the size of the record information recordable in an area portion having a size corresponding to a predetermined tolerance length. Recorder converts to recording units. The method of claim 5, The conversion device is configured to adjust the tolerance length based on at least one of a plurality of the corresponding pieces of information according to at least one of a type of the recording medium and a position of the first area on the first recording layer. And a recording apparatus for converting the recording information into a recording unit. The method of claim 5, And a storage device for storing the corresponding information. The method of claim 5, And the conversion device converts the tolerance length into a recording unit of the recording information based on the corresponding information recorded on the recording medium. The method of claim 1, When the recording information is recorded in the second area, the control device determines a position of the first recording layer corresponding to an end portion on the outer circumferential side of the portion of the area where the recording information is not recorded in the second area. And the recording device is controlled to record the dictionary information in advance in an area portion of a part of the first area except at least an area portion having a size corresponding to the tolerance length as a starting point. The method of claim 1, When the record information is newly recorded in the second area, the control device continues to the area portion where the dictionary information is previously recorded, and the size of the area portion where the record information is newly recorded in the second area. And the recording device to control to record the dictionary information in advance in an area portion of a part of the first area having a. The method of claim 1, And the control device controls the recording device to record the dictionary information in advance, except for an area portion of the first area in which the dictionary information is recorded in advance. The method of claim 1, And the recording information is recorded in one direction in the first recording layer, and the recording information is recorded in another direction different from the one direction in the second recording layer. The method of claim 1, And the tolerance length is substantially 40 mu m in the radial direction of the recording medium. The method of claim 3, And the clearance length is substantially 84 mu m. In the recording apparatus, (i) recording information is recorded by irradiation of a laser beam, and has a first recording layer having a first area in which the recording information is recorded, and (ii) the laser beam is irradiated through the first recording layer to thereby record the recording information. A recording medium including a second recording layer having a second region in which the recording information is recorded and the recording information is recorded by irradiating the laser beam through a region portion of the first recording layer in which the recording information is not recorded. A recording device for recording the recording information by irradiation of the laser light; And The first recording layer starting from the position of the first recording layer corresponding to at least one end of an end on the inner circumference side and an end on the outer circumference side of the portion of the area where the recording information is not recorded in the second area; A part of the first region except at least a region portion having a size corresponding to a tolerance length indicating an allowable range of relative positional shift between an address defined at a predetermined position of and an address related to the predetermined position of the second recording layer A control device for controlling the recording device to pre-record advance information as the recording information in an area portion of the Recording device comprising a. (i) recording information is recorded by irradiation of a laser beam, and has a first recording layer having a first area in which the recording information is recorded, and (ii) the laser beam is irradiated through the first recording layer to thereby record the recording information. Is recorded, and the recording medium records the recording information by irradiation of the laser beam on a recording medium having a second recording layer having a second area whose end on the inner circumferential side corresponds to the end on the outer circumferential side of the first area. A recording method in a recording apparatus including a device, The recording method is A first control step of controlling the recording device to record the record information; And Indicative of the allowable range of relative position shift between an address defined at a predetermined position of the first recording layer and an address related to the predetermined position of the second recording layer, starting from an end portion on the outer peripheral side of the first region. A second control step of controlling the recording device to pre-record preliminary information as the record information in an area portion of a part of the first area except at least an area portion having a size corresponding to the tolerance length Recording method comprising a (i) recording information is recorded by irradiation of a laser beam, and has a first recording layer having a first area in which the recording information is recorded, and (ii) the laser beam is irradiated through the first recording layer to thereby record the recording information. A second recording layer having a second area in which the recording information is recorded and the recording information is recorded by irradiating the laser beam through an area portion in which the recording information is not recorded in the first recording layer, A recording method in a recording apparatus including a recording device for recording the recording information by irradiation of the laser light, The recording method is A first control step of controlling the recording device to record the record information; And The first recording layer starting from the position of the first recording layer corresponding to at least one end of an end on the inner circumference side and an end on the outer circumference side of the portion of the area where the recording information is not recorded in the second area; A part of the first region except at least a region portion having a size corresponding to a tolerance length indicating an allowable range of relative positional shift between an address defined at a predetermined position of and an address related to the predetermined position of the second recording layer A second control process of controlling the recording device to prerecord preliminary information as the record information in an area portion of the; Recording method comprising a. delete delete

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